Process for the manufacture of a basket for domestic centrifuge

Abstract

Basket for a domestic centrifuge has a screen (2) having a finely perforated surface of revolution and including two annular reinforcing rings (3 and 4) disposed on the circular borders (5, 6). The screen (2) is of plastic material and the fine perforations (7, 10, 10') obtained by a process of mechanical cutting out. Thus the fine perforations (7, 10, 10') can be obtained by punching, or by cutting with a laser beam. The fine perforations (7, 10, 10') have borders with sharp edges that are directed radially inwardly, to assist in juicing. The plastic material is a polyester. The screen (2) of polyester has a wall thickness of between 0.15 mm and 0.30 mm.

What is claimed is: 
     
       1. Process for the production of a basket for a domestic centrifuge, which comprises: providing a strip of plastic material having a surface;   displacing said strip by a certain longitudinal interval to different machining stations;   perforating said strip in a first station to provide anchoring holes;   punching the strip in a second station to provide perforations, said step of punching being carried out by a tool comprising at least two rows of punchers and driven sequentially so as to sweep the surface to be perforated;   precisely cutting out a screen in a third station by providing in ends of the screen tenons and mortices to constitute a mutual interlocking device;   maintaining the screen in its shape of revolution via said mutual interlocking device; and   thereafter molding rings and ribs on the screen.   
     
     
       2. Process according to claim 1, wherein the tool used to punch the strip is movably mounted on a support, and said support is driven sequentially in rotation so as to sweep angularly the surface to be perforated.